Suunto Trek Manager (STM) .sdf files (stmsdf)

This format supports the .sdf files from the Suunto product family
'Suunto Trek Manager', 'Suunto Ski Manager' and 'Suunto Sail Manager'.
The contents of the sdf file depends on the used product and can
be one route or one track. Thats why when you want to use sdf on the
output side you have to use the
-r OR the -t option. This will tell
GPSBabel which type of data should be written.

index option

Index of route (if more than one in source).

Convert route number 'index' from source into sdf format.

We have a lot of more expressive formats thats support more than one route.
At this place sdf files are limited to only one single route. With option index
you can specify which route from source should be converted.

Our default index is 1.

This example will convert route number two and three into separate sdf files: